Attachment for windmills



(No Model.)

A, G. GARMAN.

ATTACHMENT FOR WINDMILLS.

. Patented Apr.8,1883

UNITED STATES PATENT OFFICE.

ALONZO Gr. lCARMAN, OF MARENGO, ILLINOIS.

ATTACHMENT FOR WINDMILLS.

SPECIFICATION forming part of Letters Patent No. 275,140,`datecl April 3, 1883. Application fnea'EebI-nary 5, less. (No model.)

To all whom it may concern:

Be it known that I, ALONZO G. CARMAN, a citizen of the United States ofAmerioa, residing at Marengo, in the county of McHenry and State of Illinois, have invented certain new and useful Improvements iu Attachments for Windmills; and I do hereby declare the following` to be afull, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or gures of reference marked thereon, which form a part of this specification.

This invention relates to a means for preventing a wind-wheel from being thrown out ofthe wind by the reaction ofthe gearing which intermediatelyconnects the wheel with devices mounted on the tower for transmitting motion.

In the accompanying drawings, Figure l is a side elevation of a sufficient portion ot a windmillfor illustration of my invention. Fig. 2 is a view in elevation of the same parts, looking toward the end of the vane.

The letter A designates the tower centrally',- upon the top of which is secured a horizontal disk, B, having ratchet-teeth formed upon the margin of its under side.

O is the turn-table, from which a suitable piv0t-pin extends downward through the cen- .ter of the disk B and tower A. The turn-table may be mounted to revolve upon the disk B in any other suitable manner. To the rear end of the turn-table is secured the vane D, the arm d of which is provided with a tenon, c, (shown in dotted lines,) which ts in a socket in the end of the turn-table, and is secured therein by a pin, c. On the lower edge ot' the vane D is formed a shoulder, e, in which is formed a bearing for a rOckshaft, F, which has its other bearing in the rear end of the turn-table. Upon this rock-shaft is firmly secured a detent-pawl, G, having its lower end curved under the margin ot the disk B, and provided with a catch, y, to engage the ratchet-teeth of said disk. The opposite end of this pawl projects beyond the shaft F, and is weighted, as shown at h, in order to keep the detaining-catch of the pawl up against the margin of the disk. Upon the shaft F is also rigidly secured a trip-vane, I, which normally l projects directly downward.

Referring now to Fig. 2, we will suppose the wind-wheel, which is not shown, to be in position to catch the wind, and that the reaction of the gearing tends to move the turn-table in the direction indicated by the arrow No. l. This would gradually carry the wheel away from the wind, and is a very serious defect in many windmills. reaction is prevented, as it will be observed that the engagement ot' the pawl G with the ratchet-teeth otl the disk B will eltectually preventsuch effects. If, however, the wind should change in suoli manner as to render the movement of the turn-table in the direction oli' arrow No. l necessary, the trip-vane I will be blown to one side, as shown in dotted lines, Fig. 2, and turn the rockshaft F so thatit will carry the pawl Gr downward, as also shown in dotted lines, and out of engagement with the ratchetfteeth of disk B. The setting-vane D can then shift with the wind and operate the turn-table to bring the wheel in the winds eye, and at such time the trip-vane I will resume its vertical position and bring` the pawl Gr again into engagement with the ratchetteeth of the disk. If, bythe change of the wind, it becomes necessary that the turn-table move in a direction opposite to that indicated by arrow No. 1, it is.' obvious that when the wind strikes the vane D in the direction indicated by arrow No. 2 its pressure will cause the inclined catch g of the pawl to slip under the inclines ofthe ratchet-teeth and permit the proper movement of the turn-table. By detachably connecting the arm of vane D with the turn-table, as shown, I secure great convenience in mounting the shaft F in its bearings, being thus enabled to form these bearings directlyin the edge of shoulder e and the rear end of the turn-table, instead ot' provid ing separately-attached bearing-boxes.

I wish it to be understood that I do not confine myself' to the exact construction and arrangement of parts, as shown in the drawings, as it is obvious that they may be greatly varied, while still accomplishing the object of the invention, and without departing from the true spirit and scopethereol.

By my improvement this effect of 6o IOO What I claim is.- ble vane D, provided with the sh0u1der.e,hav 1o 1. In a windmill, the turn-table A, having ing formed therein the o ther bearing for said ratchet-disk B, in combination with the vano pawl-shat, substantially as described.

D, having pivoted shaft F, carrying-a Weight- In testimony whereofI ax my signature in 5 ed pawl, Gr, and trip-vane I, substantially as presence of two Witnesses.

shown, and for the purpose set forth. ALONZO G. CARMAN.

2. The combination, with the turn-table and Witnesses:

the paWl-sha-ft F, having one of its bearings in J. B. BABCOCK,

the rear end of the turn-table, of the detaohal C. P. FILLMORE. 

